Guess the Fusion Rock Song Lyrics #185

*First line is the band name. 1970. Miami based American band that had a huge hit with this song. The band split just a year after this song. Two band members wrote the song. The number of keys on on the songwriter's Rhodes piano inspired the song. He said, "Okay, I need a first word. And what came into my head was '73.' I liked the rhythm...The song sort of just wrote itself from there." Blood Sweat and Tears covered the song in 1975.